[TriLUG] How do you know when a RAID array is BROKE?

[David Brain]

Using software raid there is a util called 'mdadm' that as one of its
(many) functions can be set up to email you in the event of a disk
failure.

And, yes, you could alternatively just write a script to monitor the
logs (or /proc/mdstat for software RAID).  This is probably the only
way to do it for hardware RAID, absent some provided software.

By default, you'd probably never know, although disk performance might
drop, until enough drives failed to kill the array - this is probably
not the way you want to be notified.

David.

On 3/16/06, Randall Barlow <randall_barlow at ncsu.edu> wrote:
> With all the RAID stuff lately, one question came to mind (from someone
> who has never used RAID but is thinking about it :)): how do you know
> when a disk has failed?  Do you just have to keep reading the logs, or
> do you configure the system to drop you an e-mail or what?  What does it
> do by default?
>
> --
> Randy Barlow
> Research Assistant
> Department of Electrical and Computer Engineering
> North Carolina State University, Raleigh, NC
> randall_barlow at ncsu.edu
> http://www.electronsweatshop.com
>
>
>
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